Kenya's government said a Sudanese man trained by al Qaeda was among the leaders of a raid on a Nairobi shopping mall in which at least 67 people were killed, the worst attack in the country in 15 years.
Al Qaeda-linked group al Shabaab has claimed responsibility for the assault two weeks ago on the Westgate centre, saying it was an act of revenge for Kenya's military campaign in Somalia, but the identities of the gunmen have remained unclear.
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